HP 40G manual Mod, Change, Total, Rad→Deg, Round

MOD	Modulo. The remainder of value1/value2.
	value1 MOD value2
	Example
	9 MOD 4 returns 1
%	x percent of y; that is, x/100*y.
	%(x,y)
	Example
	%(20,50) returns 10
%CHANGE	Percent change from x to y, that is, 100(y–x)/x.
	%CHANGE(x,y)
	Example
	%CHANGE(20,50) returns 150
%TOTAL	Percent total : (100)y/x. What percentage of x is y.
	%TOTAL(x,y)
	Example
	%TOTAL(20,50) returns 250
RAD→DEG	Radians to degrees. Converts value from radians to degrees.
	RAD→DEG (value)
	Example
	RAD→DEG(π) returns 180
ROUND	Rounds value to decimal places. Accepts complex numbers.
	ROUND(value,places)
	Round can also round to a number of significant digits as
	showed in example 2.
	Examples
	ROUND(7.8676,2) returns 7.68
	ROUND (0.0036757,-3) returns 0.00368

Using mathematical functions 10-17